Lock-mounted key-guard.



F. CARSON.

LOCK MOUNTED KEY GUARD.

' APPLICATION FILED MAR. I9. 1917.

Patented Sept. 24, 1918.

I NVENTOR Frank Kama/z.

WITNESSES ATTORN EY m NOREIS. PEIERS co.. FMOTD- u 11:11.. wumm: mu, or c.

.IN E A mounted key guard.

- .rnAnK season, or s1; Louis, MISSOURI.

'rns Arnr on ion.

v i Look-,MoU vrE KEY-GUARD.

- H p ificat n of hetters Patent. Patented Sept. 24:, 1 918.

I I Application filed March 19, 1917. Serial No. 155,807.

Be it known that I, FRANK CARso v, a citi- Zen of :the :United Statea-residing at St. Louis, State-of Missouri, have invented certain'new and usefulImprovements in Look- Mounted Key-Guards, of which thefollowing is aspecification. 1

My invention relatesto a detachable lock- The main object of the invention is to providea novel,improved, and simplified form of device of this nature which may be'detachably suspended from a knob of a door lock and engaged with the keyof the said lock to secure it in the keyhole against turningand removal from the outside, and a device of this class which may be made, if desired, principally in a single strand of metallic wire. 1

Another object is to provide an article of thiskind having a key supporting loop, a

suspending loop, an eyelet at the 'junctioifof 1 the loops, a latch secured to the eyelet,sa1d

loops having engaging hooks, and the latch being adapted to engage one of said hooks.

With the above, and additional objects, such as will hereinafter appear, in view, the invention has been embodied in one preferred form as hereinafter described and illustrated in accompanying drawings:

Figure 1 is a view showing my improved article in front elevation and in connection with a door knob and key, suggested in dotted lines;

Fig. 2 is a side view of the parts of Fig. 1, and

Fig. 3 is atop or plan view of the improved article.

Referring specifically to the drawings, wherein like reference characters designate like or similar parts, I have illustrated a door look at 4;, of which 5 is an operating knob and 6 the key of the look. This form is to be taken, of course, as conventional since the invention is capable of use with most types of key-operated looks.

The improved article is preferably but not necessarily made principally in one piece as from a strand of metallic wire. This may have a suspending loop 7 adapted to fit over the shank of the door knob 5 in order to position the article and may also have a '10 forming the termination of a free or -1'esilient arm 11 of the clasp 8. 1 The resilient arm 11 is detachably connected to-the hook 9 by means of the hook 10 and when detached, may be passed through the eye of the key 6. V

In order to secure loop 7 effectively in place and minimize the chances of detach ment offhook 10 from hook 9, I preferably employ a spring or resilient latch arm 13 V which is normally urged into the opening of the hook 9 and into engagement with the top of hook 10. One end of the latch;12 may terminate in spring coils at 13 and a lug llengaging loop 7 and forming a spring by means of which the latch is connected to the coil or eyelet '7 and urged into engagement with the hook 9. While the spring at 13normally urges the latch 12 into engagement with hook 9, yet it permits vertical and lateral movement of the latch to fa cilitate its detachment from the hook 9.

In use, the latch arm 13 is detached from engagement with the hook 9 and also the arm 11 at hook 10 is detached from engagement with said hook 9. At this time the loop 7 may be placed over the shank 5, after or before which, as preferred, the key 6 may be suspended from a loop 8 by passing the arm 11 at the hook end 10 therethrough. While the parts are in this position, the article as a whole is adapted to be swung outwardly away from the door or from the interior so that the key 6 may be inserted into the key hole of the lock. After the key has thus been inserted, the latch arm 11 is operated so that the hook 10 will engage the hook 9 after which the latch arm 13 is operated to extend into the hook 9 and on top of the hook 10. As a result, arm 13 will serve as an abutment to engage the lock parts and limit the swinging movement of the device as a whole and prevent such movement as will permit the key 6 to be dislodged from the key hole. Thus the key at night may be fastened in the key hole and cannot be dislodged by unauthorized persons endeavoring to remove the key and pick the lock. In order to remove the key, it is merely necessary to dislodge the latch arm 13 from the hook 9 as well as the hook 10 and then slide the key off of the arm 11.

Since merely the preferred embodiment of the invention has been illustrated and described, it is to be understood that changes in the details of construction may be resorted to without departing from the spirit and scope thereof. a

I claim:

1. A key guard composed of a single piece of Wire and having a suspending loop formed at one end thereof, a key supporting loop formed at the opposite end thereof, means for uniting the free ends of the said loop, a coil between the loops, and means mounted on said coil for engaging the loop uniting means. I

2. A key guard composed of a single piece of Wire and having a suspending loop formed at one end thereof, a key supporting loop formed at the opposite end thereof,

the other of said loops acting as a supporting means for a key, a coil formed between each of said loops, a latch member coiled Copies. of this patent may he obtained for around said coil, said latch member being adapted to securely hold the free ends of the loop from disengagement.

4. A key guard having a suspending loop terminating in a hook at one end, a loop to suspend a key, a coil joining said loops, a latch cooperating with said hook to fasten the. device against suflicient movement to remove the key from its lock, and said latch having a coil spring portion mounted on Said coil. a U j i 5. A key. guard having a suspending loop terminating in a hook at one. end, a key suspending loop, a coil at the. junction of and integral with said loop,.-sa id key suspending loop having a resilient arm terminating in a hook to. engage the. first men tioned hook, a latch entering the first mentioned hook, and engaging the second mentioned hook, said latch having spring coils, and said spring coils beingconnected to the first mentioned coil.

In testimony whereof I afiix my signature in presence of two Witnesses.

FRANK CARSON.

Witnesses: Y

H. GISLIONSEN, HARRY BnrnKor.

five cents each, by addressing the. Commissioner of Patents,

Washington, 10.0.?" or 

